14 Therefore, as you recall joyfully such illustrious memories of your fatherland and its glory, remember the almost numberless men in your colonies who still await those who may teach them the truths of God and impart to them "the unfathomable riches of Christ" We repeat to you the words and exhortation of our divine Redeemer to the Apostles: "Lift up your eyes and behold that the fields are already white for the harvest." "for the harvest indeed is great, but the laborers are few. Pray therefore the Lord of the harvest to send forth laborers into his harvest."
Source: Saeculo Exeunte Octavo (Vatican.va)